单项选择题

Don Cameron's interest in flying______.

A．began when he was very young
B．began at university
C．came from a with to imitate his grandfather
D．was the result of his professional experience
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单项选择题
He began working with balloons______.
A．as a relaxation from his work on aircraft
B．as part of his job at the time
C．as a hobby
D．when he heard that some Americans had crossed the Atlantic in one
单项选择题
The success of Don's business can be measured by the fact that______.
A．he has made 150 of the balloons in Britain
B．he now has enough orders to employ a number of people
C．he delivers balloons to France
D．he is going to move his factory to America
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